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Effects Ti/TiAlN composite multilayer coatings on corrosion resistance of titanium alloy in solid NaCl-H2O-O-2 at 600 degrees C
Zhang, MM; Xin, L; Ding, XY; Zhu, SL; Wang, FH; Xin, L (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang, Liaoning, Peoples R China.
2018-02-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume734Pages:307-317
AbstractThis paper investigates corrosion resistance of Ti-6Al-4V coated by Ti/TiAlN composite multilayer coatings with different Ti layer thicknesses in presence of solid NaCl, H2O and O-2 at 600 degrees C. Effects of TiAlN single layer coatings with different thicknesses on the corrosion resistance of Ti-6Al-4V were also studied for comparison. The results showed that the thick TiAlN single layer coating and the Ti/TiAlN composite multilayer coating with Ti layer thickness of 0.15 mm exhibited good corrosion resistance in the above environment, while localized accelerated corrosion of substrate occurred for thin TiAlN single layer coating and Ti/TiAlN composite multilayer coating with Ti layer thickness of 0.3 mm coated specimens. It is proposed that improvement of corrosion resistance of titanium alloy by application of TiAlN single layer coating and Ti/TiAlN composite multilayer coating is attributed to suppression of active corrosion induced by gaseous metal chloride, hydrochloric acid and chlorine in the corrosion process. Accelerated local corrosion of thin TiAlN single layer coated specimen is related to existence of intrinsic through-coating defects such as pinholes in the coating. For the Ti/TiAlN composite multilayer coating with Ti layer thickness of 0.3 mm, volume expansion caused by oxidation of Ti in sublayers to TiO2 when corrosive media diffused into along through-layer defects in top TiAlN layer led to bending and cracking of the sublayers of the composite multilayer coating and eventually accelerated local corrosion of the coating and substrate. (C) 2017 Elsevier B.V. All rights reserved.; This paper investigates corrosion resistance of Ti-6Al-4V coated by Ti/TiAlN composite multilayer coatings with different Ti layer thicknesses in presence of solid NaCl, H2O and O-2 at 600 degrees C. Effects of TiAlN single layer coatings with different thicknesses on the corrosion resistance of Ti-6Al-4V were also studied for comparison. The results showed that the thick TiAlN single layer coating and the Ti/TiAlN composite multilayer coating with Ti layer thickness of 0.15 mm exhibited good corrosion resistance in the above environment, while localized accelerated corrosion of substrate occurred for thin TiAlN single layer coating and Ti/TiAlN composite multilayer coating with Ti layer thickness of 0.3 mm coated specimens. It is proposed that improvement of corrosion resistance of titanium alloy by application of TiAlN single layer coating and Ti/TiAlN composite multilayer coating is attributed to suppression of active corrosion induced by gaseous metal chloride, hydrochloric acid and chlorine in the corrosion process. Accelerated local corrosion of thin TiAlN single layer coated specimen is related to existence of intrinsic through-coating defects such as pinholes in the coating. For the Ti/TiAlN composite multilayer coating with Ti layer thickness of 0.3 mm, volume expansion caused by oxidation of Ti in sublayers to TiO2 when corrosive media diffused into along through-layer defects in top TiAlN layer led to bending and cracking of the sublayers of the composite multilayer coating and eventually accelerated local corrosion of the coating and substrate. (C) 2017 Elsevier B.V. All rights reserved.
description.department[zhang, mingming ; ding, xueyong] northeastern univ, sch met, 3 wenhua rd, shenyang 110819, liaoning, peoples r china ; [zhang, mingming ; xin, li ; zhu, shenglong] chinese acad sci, inst met res, lab corros & protect, 62 wencui rd, shenyang, liaoning, peoples r china ; [zhu, shenglong] northeastern univ, sch mat sci & engn, 3 wenhua rd, shenyang 110819, liaoning, peoples r china
KeywordNacl Deposit Oxidation Resistance High-temperature Ti60 Alloy Ti-6al-4v Alloy Water-vapor Behavior Tin Ti6al4v Microstructure
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [U1537107]; National Key Research and Development Program of China [2017YFB0603801]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79501
Collection中国科学院金属研究所
Corresponding AuthorXin, L (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, MM,Xin, L,Ding, XY,et al. Effects Ti/TiAlN composite multilayer coatings on corrosion resistance of titanium alloy in solid NaCl-H2O-O-2 at 600 degrees C[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,734:307-317.
APA Zhang, MM,Xin, L,Ding, XY,Zhu, SL,Wang, FH,&Xin, L .(2018).Effects Ti/TiAlN composite multilayer coatings on corrosion resistance of titanium alloy in solid NaCl-H2O-O-2 at 600 degrees C.JOURNAL OF ALLOYS AND COMPOUNDS,734,307-317.
MLA Zhang, MM,et al."Effects Ti/TiAlN composite multilayer coatings on corrosion resistance of titanium alloy in solid NaCl-H2O-O-2 at 600 degrees C".JOURNAL OF ALLOYS AND COMPOUNDS 734(2018):307-317.
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